Symptoms

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The symptoms of lichen planus vary depending on the areas affected. Typical signs and symptoms include:

Purplish, flat-topped bumps, most often on the inner forearm, wrist or ankle, but sometimes on the external genitals

Itching

Blisters that may break to form scabs or crusts

White spots or patches in the mouth — inside the cheeks or on the gums, lips or tongue

Painful oral or vaginal ulcers

Hair loss and scalp discoloration

Nail damage or loss

When to see a doctor

If tiny bumps or a rash-like condition appears on your skin for no apparent reason, such as a known allergic reaction or contact with poison ivy, see your doctor. Also, see your doctor if you experience any signs or symptoms associated with lichen planus of the mouth, genitals, scalp or nails. Because a number of skin and mucosal conditions can cause lesions and discomfort, it's best to get a prompt and accurate diagnosis.

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